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Golish, D. R.; Drouet d’Aubigny, C.; Rizk, B.; DellaGiustina, D. N.; Smith, P. H.; Becker, K.; Shultz, N.; Stone, T.; Barker, M. K.; Mazarico, E.; Tatsumi, E.; Gaskell, R. W.; Harrison, L.; Merrill, C.; Fellows, C.; Williams, B.; O’Dougherty, S.; Whiteley, M.; Hancock, J.; Clark, B. E.; Hergenrother, C. W.; Lauretta, D. S.
Space science reviews, 2020/2, Volume: 216, Issue: 1Journal Article
The OSIRIS-REx Camera Suite (OCAMS) onboard the OSIRIS-REx spacecraft is used to study the shape and surface of the mission’s target, asteroid (101955) Bennu, in support of the selection of a sampling site. We present calibration methods and results for the three OCAMS cameras—MapCam, PolyCam, and SamCam—using data from pre-flight and in-flight calibration campaigns. Pre-flight calibrations established a baseline for a variety of camera properties, including bias and dark behavior, flat fields, stray light, and radiometric calibration. In-flight activities updated these calibrations where possible, allowing us to confidently measure Bennu’s surface. Accurate calibration is critical not only for establishing a global understanding of Bennu, but also for enabling analyses of potential sampling locations and for providing scientific context for the returned sample.
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